Lock



Patented Dec. 29, 1925.

,UNITED STATES y. 1,567,979 PATENT OFFICE.

CHARLES EDGAR NoR'rHRoP, DECEASD, LATE or oRIoN, MICHIqANyBY CLARA I.

NoRTHRoP, ADMINISTRATRIX, or oRIoN, MICHIGAN.

LOCK.

Application led January 26, 1924. Serial No. 68,820.

To all whom it may concern:

Be it known that I, CLARA L. NORTHROP, a citizen 'of the'United States, and a resident of Orion, inthe county of Oakland and State of Michigan, administratrix of the estate of CHARLES EDGAR NoRTHRoP, deceased, late a citizen of the United States, and late a resident of Orion. in the county of Oakland and State of Michigan (as by 'reference to the duly certified copy of letters of administration will more fully appear), who -did in his lifetime invent a new and Improved Lock, do declare the follow,- ing is a full, clear, and exact description.

This invention relates to locks and has for lan object t'o provide an improved construction wherein a plurality of diiierently ac-v tuated tumblers are provided.

- Another object is to provide a lock of the tumbler type in which there is provided a` key operated series of tumblers and a operated series of tumblers. l A still further object of the invention 1s pawl '.to provide a lock of thet-umbler type in which a plurality of differently operated l tumblers are provided and a locking pin associated with onel set of tumblers whereby an exact lfitting key must be provided to answer the requirements of the different series of locking means.

In the accompanylng drawing- F1gure 1 1s a longltudinal vertical sectional view through a lock embodying the invention, the same being shown in a locked position with a key partially inserted.

Figure 2 is a sectional view through Figure l, approximately on line 2-2.

Figure 3 is a view similar to Figure 2 but showing the key inserted to a great extent.

Figure 4 is a view similar to Figure 3 but showing the key fully inserted andthe locking tumblers and other mechanism moved to an unlocked position.

Figure 5 is a front elevation of the lock shown in Figure 1 with a covering plate partially broken away.

Figure 6 is a sectional view .through Figure 1, approximately on line 6-6.

Referring to the accompanying drawing by numerals, 1 indicates a barrel and 2 a. cylinder rotatably mounted in the barrel 1. The barrel V1 may be connected to a door or other device in any desired manner and the bolt in any suitable mannelg'said squared member belng pivotally connected to the cylinder by a suitable pin 4. .In forming the bore in the, barrel. 1 for receiving the cylinder 2, an "arc-shaped' groove 5 is also provided, said groove being of some appreciable width forpurposes hereinafter fully., described. Thfe cylinder l2 is alsol provided with an annular groove 6 accommodating the pin 7 mounted in any desired manner in the barrel 1 whereby the cylinder may freely rotate but cannot be moved longitudinally.

In forming the barrel 1, suitable apertures are provided for the various tumber structures 8 and 9 and also a suitable key slot 10 is provided for receiving the key 11. The key slot 10 is provided with a sleeve 12' having an enlarged end 13 covering the end of the cylinder 2 an-d also for lapping somewhat ypart of thef barrel 1. The sleeve 12 is provided with a passage-way for receiving the key 11 and alsoa cut-out portion or slot 14 registering with the cut-out portion 15 in the cylinder 2.

From Figure 2 it will be' noted that the cut-out portion 15 merges into the opening adapted to receive the tumblers 9. These tumblers, as well as tumblers 8, are of'the usual .construction and are kspring pressed so that normally their connecting members will be out of line with the surface of the cylinder 2 so as to prevent rotation thereof. As these members are of ordinary construction, it is thought. no further description will benecessary. y

As indicated in Figuie 1, the tumblers 8 are operated by the raised portionl whereby they are properly moved tol permit the cylinder to ,rotate. In order to cause the tumblers 9 to move to an inoperative positiona pawl or dogl' is provided .pivotally connected at 18 to the key 11. This pawl is provided with a rounded hook-shaped portion 19 merging into an end 2() and also providedwith a tail section 21 which has a rounded back designed to' engage the lower section of tumbler 9, and raise said tumbler as indicated in Figure When the key is key is moved to the position shown in Figure 4. The pin 24 is provided with a proj ecting lug 26 which normally fits in the end of slot 27, which slot or groove extends longitudinally of the barrel 1. When the pin v24 is moved back to the position shown in Figure 4, the lug 26 will be brought opposite, or rather into, thearc-shaped groove whereby the "cylinder 2 may be freely rotated as the lug 26 will not stop such movement and as the respective tumblers 8 and 9 are already moved toan inoperative position. It vwill be' noted that the projection 16 operates oneiset of tumblers while the pawlj or dog 17 operates the other set of tumblers and the pin 24. As the "parts are made to fit properly and also as the parts. are small, it will be necessary n ot on y to make the projection 16 oi a proper height to shift the tumblers 8 but it lwill also be,

necessary to mount the pawl' 17 in correct position and-make this pawl of the proper length.

In view of the accuracy in -which pavvl 17 is to be mounted, it will be difficult to duplibarrel into the cylinder, a pin'carried by the cylinder and projecting into the barrel, and

a key formed with means for simultaneouslyl moving said pin and tumbl'ers to an inoperative position rotated.

`2. In a lock of the character described, a barrel, -a cylinder rotatably mounted in the barrel, a tumbler structure for connecting the barrel and cylinder, a pin for connectinfr the barrel and cylinder, and a key provi ed with a pivotally mounted pawl formed with oppositely acting ends constructed'to move the tumbler structure and the pin to inoperative positions when the key is fully inserted whereby saidcylinder may be rotated. Y

3. In a lock of thecharacterdescribed, a

lock `structure and key, said key being 1 formed substantially fiat with a raised portion, said key being alsoprovided with a notch anda pawl pivotally mounted therein, said pawl having its pivotal mounting intermediate the ends whereby there are provided opposite Working ends, said lock being formed with a slot for receiving said key and with a plurality of locking tumvvhereby the cylinder may be bler vstructures adapted to move to inoperative positions by said paWl and by said raised portion.

4. The combination with a lock having a casing, a rotatable barrel positioned. in the casing, a tumbler structure normally locking said barrel against rotation, of a key therefor comprising a flat body having a raised portion and an opening, a pawl normally arranged in said'opening, and a pivoted pin extending throu h said pawl intermediate the ends, saitlf1 ends acting to operate said tumbler structures when the key is in use.

`5. In a lock, a barrel having a bore extending entirely therethrough, a cylinder rotatably mounted in said bore, means for preventing longitudinal movement of said cylinder, said cylinder being provided with 'and an arc-shaped groove and a longitudinally arranged positioning groove intersecting the arc-shaped groove, a cylinder rotatably mounted in the bore, va pin mounted to reciprocate in said cylinder, said pin beingi formed with a projection adapted to normally fit into said longitudinal groove, and a key formed with means for moving said pin so that the enlargement thereof will be in said arc-shaped roove when the key is' fully inserted whereby said cylinder may be freely turned. 7. In a lock of the character'described, a barrel, a cylinder rotatably mounted in the barrel, said barrel being provided with a longitudinally extending groove and an arcshaped groove .intersecting with the longitudinally extending groove, a spring pressed reciprocating pin carried by the cylinder and formed with a projection normally fitting into the longitudinally extending groove for locking the barrel and cylinder together, said pin being adapted to be moved against the action of said springr for causing said enlargement to be positioned in said arcshaped groove whereby the cylinder may be freely rotated.

CLARA L. NORTHROP,

Administrativa of the Estate of Charles E, l

` Northrop, Deceased, 

